Which one?
Beyond The Valley of the Dolls is about a female rock group iirc.
Faster Pussycat Kill Kill has a kind of seige plot.
No matter Russ Meyer's plots, he always managed to cram in loads of huge-breasted women and, as cinema got more liberal, more and more sex.
Beyond the Valley of the Dolls is about some naive female band who suddenly get big and all the problems that come with fame. It's just insanely over the top with lots of mind bending drugs + breasts + other ridiculous stuff. Touches on lots of sensitive subjects in absurdly insensitive ways (disability, abortion, lesbianism, transexuals). The ending is one of the most bizarre I've ever seen and the dialogue is legendary for it's randomness. Great stuff.
I've not actually seen Faster Pussycat, I definitely should though if it's anything like Dolls.